Answer:
It will take 6 seconds for the ball to reach the ground.
Velocity:
.
Step-by-step explanation:
We have been given that a ball dropped from the top of a building has a height of
meters after t seconds.
The ball will hit the ground, when height will be 0 meters, so we will equate height with 0 as:

Let us solve for t.




Taking positive square root of both sides, we will get:


Therefore, it will take 6 seconds for the ball to reach the ground.
To find the ball's velocity at
, we will take the derivative of position function and evaluate derivative at
.





Therefore, the ball's velocity at the moment of impact would be
.
Replacing for values of a and c in the equation
a=20
c=8
m=4a+2c
m=4(20)+2(8)
m=80+16
m=96
Answer:
$22.02
Step-by-step explanation:
3(6.75)(1.0875) = 22.021875 ≈ $22.02 (Assuming the store rounds down.)
You just need to put words into an equation.
4xy-2xy
Then simplify it to get 2xy
Answer:
(C) $1.12
Step-by-step explanation:
Multiply .75 by 7 to get the total pen cost. Then subtract that from $9.73 to get the total pencil cost, which is $4.48. Then divide by 4 since that is the amount of pencils.
Hope this helps